Poor fuel economy

2011 FORD EDGE
147,239 MILES • 3.5L • V6 • 2WD
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DEIONDRAWILSON
  • MEMBER
  • 1 POST
My vehicle is getting terrible fuel economy as of late. My husband hooked up an obd reader but no codes pop up. He just changed out the radiator as well as the front brakes. We are about ready to give up on our only source of transportation and we really can't afford to.
Jun 30, 2021 at 12:04 PM
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SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

Is this poor fuel economy happened overnight or did it slowly go down?
Have you done any recent maintenance?
Any other issue you might be noticing besides the poor fuel economy?
Please let us know.
Thanks.
Jul 1, 2021 at 2:51 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
There are a number of things that will cause poor fuel economy so we can going to have to start with the basics and inspect and replace the common things starting with air and fuel filters.

https://www.youtube.com/watch?v=-gGhscefLO0

https://www.youtube.com/watch?v=wi6kzRjk5to

Next we need to inspect the spark plugs and replace them while you have them out.

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Below is a chart to help find out what if they are showing signs of being fouled.

Lastly we have to monitor the o2 sensor data with a scan tool to find out if they are showing the exhaust is rich or test them using this guide:

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

Below you will find the charts that I would referring too plus a chart that help with o2 sensor data.

Please let us know if you have serviced this recently and we can go from there. Thanks
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Jul 1, 2021 at 2:56 PM
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